Update CHANGELOG-EE for 8.10.7, 8.9.8, and 8.8.9

[ci skip]

CHANGELOG-EE

@@ -16,6 +16,9 @@ v 8.11.0 (unreleased)
   - [Fix] Push rules check existing commits in some cases
   - [ES] Limit amount of retries for sidekiq jobs
 
+v 8.10.7
+  - No EE-specific changes
+
 v 8.10.6
   - Fix race condition with UpdateMirrorWorker Lease. !641
 
@@ -52,6 +55,9 @@ v 8.10.0
   - Ticket-based Kerberos authentication (SPNEGO)
   - [Elastic] Suppress ActiveRecord::RecordNotFound error in ElasticIndexWorker
 
+v 8.9.8
+  - No EE-specific changes
+
 v 8.9.7
   - No EE-specific changes
 
@@ -99,6 +105,9 @@ v 8.9.0
   - Ability to lock file or folder in the repository
   - Fix: Git hooks don't fire when committing from the UI
 
+v 8.8.9
+  - No EE-specific changes
+
 v 8.8.8
   - No EE-specific changes